MUST ANSWER ALL IN WORD EXPLANATION

1) The freshman is moving some of his boxes from the roof of his car, which is 2.5 meters above the ground. How much gravitational potential energy does the 5 kg box on his roof have? The freshman moves a 5 kg box with velocity of 2m/s. What is the kinetic energy of the box?

2) How much work does the freshman do in each of these situations? Causing a 50 kg cart to roll 5 m/s when it was going 2m/s. Carrying a 10 N box 20 meters. Lifting up a 30 N box and putting it back down in the same spot.